material for torsion spring
stainless steel, spring steel, carbon steel, 65Mn, music wire torsion spring surface treatment
chrome,zinc,nickel,gold,silver plating,black oxided, paint spraying torsion spring certificate
torsion spring appliance
automotive,electrical equipment, household appliances, furniture torsion spring category
compression springs, compressed springs, coil springs, spiral springs terms of payment for torsion spring
T/T, D/P,D/A, L/C, WESTERN UNION,Paypal torsion spring means of transportation
sea transportation, air transportation, railway transportation torsion spring export countries
USA, Canada, England, Australia,New Zealand and so on